Hello Everyone, My problem is that I cannot get inbound faxing to work. I've configured the fax server and default fax extension as instructed in the documentation. Inbound fax calls are being connected to the system fax extension, but after just a few seconds, the call is being dropped. The answering side, i.e. the 3CX system, is not giving a fax answering "warble" if you call it directly (I'm not sure if that should even happen with T.38). I've tried: - Having the inbound trunk be A) a VoIP provider, that assures me they are T.38 compliant and B) a good old fashion POTS line gateway-ed via a Patton FXO gateway. - Making sure the 5100 and 10000 TCP and UDP ports are open on my server, as they both seem to play a part in faxing. - Followed the instructions on the 3CX FAQ "Receiving faxes from VoIP providers" at http://wiki.3cx.com/documentation/fax-1/receiving-faxes-from-voip-providers - Fax directly to "The e-mail address of a (regular) extension" rather than the system's default fax extension. - Adding the "SipPort" setting to the 3cxPhoneSystem.ini file, as our Network SIP port is 5070. None of these things have helped, and our phone system works just fine otherwise (and has for some time now). We are running the latest version 8.0.9532.468, and our server has a NIC with a static public IP address (i.e. it is not behind a hardware firewall or NAT). Here is an example of what is happening: 16:33:09.670 [CM503008]: Call(727): Call is terminated 16:33:08.264 [CM503007]: Call(727): Device joined: sip:firstname.lastname@example.org:5100;user=phone 16:33:08.249 [CM503007]: Call(727): Device joined: sip:email@example.com:5060 16:33:08.233 [CM503002]: Call(727): Alerting sip:firstname.lastname@example.org:5100;user=phone 16:33:08.108 [CM503025]: Call(727): Calling @[Dev:sip:email@example.com:5100;user=phone] 16:33:08.092 [CM503004]: Call(727): Route 1: @[Dev:sip:firstname.lastname@example.org:5100;user=phone] 16:33:08.092 [CM503010]: Making route(s) to <sip:email@example.com:5070;user=fax> 16:33:08.077 [CM505003]: Provider:[PINS] Device info: Device Not Identified: User Agent not matched; Capabilities:[reinvite, replaces, able-no-sdp, recvonly] UserAgent:  PBX contact: [sip:firstname.lastname@example.org:5070] 16:33:08.077 [CM503001]: Call(727): Incoming call from 3036904065@(Ln.10005@PINS) to <sip:email@example.com:5070;user=fax> 16:33:07.967 [CM503012]: Inbound out-of-office hours rule (General Adigo Fax ) for 10005 forwards to Fax:989 You can see that it just seems to route fine, and then a second or two later "Call is terminated". This has got to be something simple, right? Any help would be greatly appreciated. Thank you! C.J.